Relation & function

Question

If f(x) =x^2 - 2x, find: f(-3)=

Answer 1

f(x) = x² - 2x

f(-3) = (-3)² - 2(-3) = 9 + 6 = 15

Answer 2

Hello, Courtney,

f(-3) means a value of a function that has "-3" as it's input. The equation is defined as =x^2 - 2x, find: f(-3)=

When the questions asks for f(x) and you are given f(x ) = x^2 - 2x as the equation, just substitute -3 where x appears:

f(-3) = -3^2 - 2*(-3)

f(-3) = 9 + 6

x = 25

I hope this helps, Bob